18QHTF21-13.503-PD

Overview

The 18QHTF21-13.503-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 13.503 MHz with an LVCMOS output logic interface. The device requires a supply voltage of 1.8V and features a standby or power-down control function for energy management. It is housed in a compact 4-SMD, no-lead package with dimensions of 2.0 x 1.6 mm. This component is designed for applications requiring precise timing signals within low-voltage digital systems.

Feature Summary

• LVCMOS output logic interface for digital compatibility
• Integrated standby and power-down functionality
• Compact surface-mount package design

Applications

• General purpose clock signal generation
• Low-voltage digital circuit timing
• Embedded system clock sources

Procurement Notes

Verify the specific operating temperature range and load capacitance requirements against the official datasheet before integration. Confirm that the 1.8V supply voltage aligns with the target system's power rails. Ensure the PCB footprint matches the 2.0x1.6mm SMD no-lead package dimensions to guarantee proper soldering and mechanical stability during assembly processes.

Selection Notes

Select this model when a 13.503 MHz frequency is strictly required for the application. The 1.8V supply voltage makes it suitable for modern low-power digital designs. Consider the LVCMOS output level if interfacing directly with standard logic families. The power-down feature offers flexibility for battery-operated devices requiring sleep modes.

Part Context

This part belongs to the 18QHTF21 series from Mercury Electronics, which includes various frequencies such as 21.5 MHz and 51.2 MHz. All variants share similar packaging and electrical characteristics but differ in output frequency. The -PD suffix indicates the inclusion of power-down control capabilities, distinguishing it from versions without this feature.

Replacement Considerations

Direct substitutes include other 18QHTF21 series parts with identical pinouts and voltages, such as 18QHTF21-21.500-PD or 18QHTF21-51.200-PD, provided the frequency difference is acceptable. Cross-reference with other manufacturers' 13.503 MHz LVCMOS oscillators in 2.0x1.6mm packages if availability is an issue.